Grease gun



Feb. 14, 1928.

A. A. KLEMS GREASE GUN Filed July 26 Feb. 14, 1928. 1,659,204

A. A. KLEMS GREASE Gun Filed July 26 1920 2 Sheets-Sheet 2 WQQW 61km nagPatented Feb. 14, 1928.

ALBERT A. KLEM S,7OF DETROIT, MICHIGAN,ASSIGNOR-TQFOBD W. HARRIS, LOS-ANGELES, CALIFORNIA.

GREASE GUN.

Application filed July 26, 1920. Serial No. 398,946. This inventionrelates to what are comdevice, through the upper end of which the monlyspoken of as grease guns, and has piston stem B, carrying the piston C,is movfor its object an improved organization of able, the stem. Bhaving a screw-threaded parts by means of which a relatively heavyengagement through the stutling box D,

lubricant of low viscosity may be forced into which in turn is adaptedtobe screwed to the the bearings of machines, vehicle wheels andcentrally apertured projection D on the end the like, with a far greaterpressure than is of the shell or casing A. The first section E I nowpossible, when reliance is placed upon ofthe extension pipe isdetachably secured, an apparatus involving, among other eleas by screwthreading, to the apertured proments,- a hose member, even when metallyjection E on the opposite end of the shell 05 reinforced, the ordinarybayonet slot confrom that through which the stem B engages, ,nection'between the terminal of the apparaso that when the extension pipe E isdetached tuS and the outer end of the grease nipple from the shell, andthe stuiiing box D is unor cup etc. 7 screwed from its anchorage D,thethreaded In the drawings: projection E may be lowered into a supplyFigure 1 is a perspective of my improved of heavy oil; the piston Chaving meantime device, showing how it can be most convenbeen slid tothe lowerend of the shell A, a iently used around the projecting edge orstrong and continued upward draw upon the corner of some structural partthat would stem B will result in filling the shell A withordinarilyintertere with convenient access the desired supply of heavylubricant. The to thegrease cup. extension pipe E isthen screwed ontothe Figure 2 is a partly sectional elevation. projectionE, and thestuffing box D screwed Figure 3 is an enlarged sectional detail, to itsseat about the threaded exension D, taken along the line 33 of FigureQ,showthus preventing further movementv of the ing my device inpositionrelatively to the stem B. and its piston C toward, the outlet adjacentend of agrease cup,the outlet valve end E of the casing, except as thehandle being forced thereby into open position. of the stem B is turnedto effectthe gradual Figure 4: is an end elevational view of the thoughpowerful advance of the piston C; clamping cap on the end of theextension toward the outletend E of the casing, drivpipe'of the greasegun. ingthe lubricant before it through the ex- Figure 5 is a similarview to Figure 4:, tension pipe E and its connected parts.- showing theoutlines of the grease cup in the The outer end of the extension pipe Eis center and enclosed by the cap piece of Fig bent or elbowed as at L,and this latter porure 4, before being turned relatively thereto, tionis provided with a lateral outlet hole F. to effect clamping action.which lies in the line of the groove G, so that Figure 6 is a sectionalview taken along whatever lubricant is forcedout. through the the line66 of Figure 3, showing the key extension pipe E, can emerge through thepieces which cooperate with the slots in the hole F and the groove Ginto the central cap to effect the locking action on the grease apertureH of the barrel piece J, whose in- 1 cup or nipple. ner end portion Kslidably engages about Figure 7 is a partly sectional and partly thegrooved portion of the elbow section L. elevational view of a slightlymodified form In the outerend of the barrel piece J is loof terminalclamping cap in position about cated a helical spring M, the inner endof a grease cup or nipple. which rests upon the centrally aperturedFigure 8 is'a similar view with the grease cross wall I, while its outerend, pressing cup or nipple forced into seating position against thevalve piece N, serves to yieldand clamped, the end of the cap beingthiningly hold it in place in its seat Q. so that ner than in Figure 7its central bore P and the lateral extension Figure 9 is an endelevational view of the thereof P are blanked by the surroundingposition of the parts as shown in Figure 7. nut R from the accessthereto and there- Figure 10 is a similar end elevation, the through ofthe grease that hasbeen forced cap being of the modified type shown inFigthrough the extension pipe E and the bar ure 8 and engaging partlyover the tapered rel piece J and past the head of the valve N. shoulderof the grease cup. The outer end of the barrel piece J is en- A.represents the barrel or casing of the larged, as at T, to permit theengagement 1 i an grease cupto its seat,

thereoverof 'the' cap S, whose edges engage I under the enlargement T'ina. way to hold thecap S in position thereon, while permit tin'g"'itsr'rotati've movement relatively to the thekeypieces V, which: areinterposed bc-'- tween the end of the enlargementT andthe 1oadjacentfinner surfaceslots being cut of different radii from that ofthecap Sand of the key pieces V, when-e ever the cap S is turned, the guidestuds. V engaging through, the slots vU, cause the ja'centsides of awhichhasbeen inserted through the central "aperture VVzin: the cap Sthereby locking-it in position rwithin .the, barrel piece. The] of f theenlarged part Tl limiting edges serve to gulde the key pieces inwardlyand against the sidesofthe inserted grease niprf 'plewas the key, piecesare actuated by the turning of the cap 8.

againstithe end of the yieldingly projected valve piece N within thebarrel J thus fforcing it .tothe open position shown, and conse''quently' making it possible for the lubricant to pass by the headoffthe' valve N; through 1 the'oil passages P'- and P therein,andagainst the: spring-held ball vpiece W which closes the' exposed"outer end of the centrally bored greasecupW; into which it is desiredthat the-lubricant berforcedli So long as the cap is in -such eccentriclockingpo'sition relative-' 'l 'tothe enlarged end Tiofthe ba'rrehithus,preventing the detachment of the-barrel and} its connected. "extensionpipe and cylinder Y from the. exposed 'end of the grease cup,thereisthus constituted a*c'o ntinuous chan- V nel for the forced-flowofthe lubricant from the interior of the cylinder-.A, to the grease cupNV, at no point inwhich is there a weak link or section such as; wouldbe constituted bythe hose or flexible piping now generally relied uponto afford access to parts relativel y inconveniently located. A highdegree of 50 forcing power derivable from thescrewthreaded projection ofthe ste1nj-B, and its piston C,"th0ugh this is regulatable both as to.timeof action and'quantityof lubricant projected according to thecircumstances of each case. 7 1 V 'IDTthQ form of engagement terminaland V of its cap on the barrel piece shown in Fig;-

' i ,ures 31:0v 6 inclusive, reliance is placed upon I vthe clampingaction of the key pieces just, de- 60 scribed thegreasecup aperture inthe cap Sf being concentrically located with respect to of the cap S.These movement of thekeypieces V against the ad'- grease cup or nippleWV,

The (forcing of the illustrated particularly ln Figure 3, has served tobring its end seating;of the -valve N tionof its spring M. 1

"bi'natio'n of j a tapered seat provided in" said-mouthpiece ccntrically said nipple; and a" bonneteccentricallyf m cation.

the caps, as wellj as to thecommonacentrajl 3 axis ofthe barrel J andgrease" cup or nipple In Figures 7;-to 10 however, I"h ave llustratect aslightly modified form, from; whiclrtlieikey pieces VT are'jomittedzy-,"placethereof, I rely upon therp'ositiening of j the grease cupaperture,intheiextenslon head X slightly itoone' side of the centralaxis of the barrel J andposition theaperture Y in a the capZaccordingly; this positionis' shown in Figures 7 and 9. When the grease.cup. is forced asiar; within the head- X, as' possible, therebyunseatingthe valve N; thecap' Z} I now turned about the head. X untilits apert u're- Y is no longer concentric with-the axis of the greasecup, and one edge o flthe aper-f; 1 ture in the cap engages againsttheytaperedj neck and shoulder. portion of the nowiseatedi grease cup ornipple in a way-to hold. itj-both, against escape vand in seatingposition rela-VU tiv'ely tothe valve N. iTliis'is shownjin Elgures 8 and10, IVVhen thefproperainount of lubricant has been forced intothegrease-cup v by action ofthestem Bandpiston (lewithin the shell A, thecapZmaybe rotated inth opposite direction into its aperture ,1 alignmentwith the sidesgof the grease feup, I as shown'in'Figures 7 and 9 and-thebar-rel: end may then be removed from the exposedg, end of the reasecup, thereby,enablingtlie," once; more underw'ac- "'XVhatI 'claim'is: ffr 1 5 m 1; In a' grease gun.1adapt edto Supplylu bricant to ataperinggrease, nipple, thegcoin' grease ejecting means a mouthi pieceprovided upon said meangEthereibei-ng adapted to fitsaidnipple; and a'bonnet ec rotatable upon said 'rr'iouthpiece', there being an openingeccentrically 'fo'rmed in said bonnet through "which said nipple; isadaptedto extend to engage said seat, said if bonnet being manuallyrotatable to lock said nipple against said seat! I a v i 2. In a greasegunadapted to bricant to. a grease, nipple, the combinationc of:greaseejecting means; a mouthpiece pro-;- vided upon said means, therebeing a seatfllo provided inl saidmouthpiece adapted to tatable uponsaid mouthpiece, there being anopening e'ccentrically formed in saidbonnet through which saigsl' nipple is adapted to ex} l tend to engagesaid sez'it,,'s aidljbonnet being manually rotatableto lock said nippleagainst said seat. I c '7 In testimony Whereof' 'lsignjthis specifi-LBERT

